Newbie on Hookups
I think RV piping is good for 40 PSI, at least all the regulators I've seen available seem to be set to that. I don't know what percentage of RVs have them built in, but I suspect it is less than 50%. Make sure you have one, and if not, get an external one. One hookup without, and I blew the toilet intake seal and the water pump pressure switch...
And while we are on the subject of hookup safety, there is no guarantee how good the water supply is. An inline water filter ia good idea. I use the one from Camping World which is supposed to be good down to bacteria size. Then I've got a purifier under the sink for drinking water.
Electric hookups can be a problem too. The first suggestion is to have a power guage to plug in before you plug in the trailer. A good one will tell you if there are any wiring errors, and voltage and frequency. If the power source passes this test, its ok to plug in the trailer. However it would be wise to have a good surge protector in the system, and possibly some low voltage protection.